Storage-battery grid.



. E. E. EVERETT.

STORAGE BATTERY GRID. `APPL|cAT|qN mep JUNE 23,1913.

53,8()7. n APatented May 16, 1916.

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grid emtar elevation of a'storage batteryI 1s a verbo ying myimprovement. Fig.

tical sectional view ofsaid grid, taken on" -bars pressed together toclose the opening primarily existing between them. Fig. VI is afragmentary sectional view, taken on the line VI, VI in Fig. V. Fig. VIIis' an inverted plan view similar to Fig. III but showing a modifiedform of my invention. Fig. VIII is a fragmentary elevation of the righthand edge of the grid shown in Fig. VII. Fig. IX is an inverted planview simivlar to Fig. VII but showing t-he base bars pressed together'toclose the opening p'rimarily existing between them. Fig. X is afragmentary elevation, similar to Fig. VIII but showing said base barspressed together as in Fig. IX. Fig. XI is a fragmentary elevation,similar to the lower .left yhand corner of Fig. I, but showing amodified form of gratings.

Referring to the form of my` invention shown in Figs. I to VI inclusive;the plate 1 having the terminal lug 2 is a unitary metal castingincluding a rectangular, plane frame having single members 4, 5 andrespectively forming the top and opposite vertical edges of said plate,and having two parallel base bars 7 at the bottom edge of said plate..As shown in Figs. III, V and VI each of said base bars 7 is onehalf thethickness of said plate so that when pressed together as shown in Fig. Vtheir opposite plane faces are flush with the opposite plane faces ofsaid side frame members 5 and G. In order to permit said base bars tothus close together they are tapered to less thickness at their unctionswith said frame members 5 and 6 as shown in Figs. III' and V. Saidunitary metal casting includes the five partition bars S) which arerecessed, in `the direction of their length, between said base bars 7 asindicated at 10, the upper ends of said recesses being wedge shaped asindicated in Fig. II. Said partition bars 9 extend parallel with saidopposite vertical frame members 5 and (i, in spaced relation, -formingbetween them a series of six vertical chambers 12 in said casting, foractive material, said chambers opening between said base bars andextending to the frame members 4 at thc top'ofsaid casting, as shown inFigs. II and III.

Said chambers 12 are inclosed at the oppo.

site plane faces of the plate 1 by respective gratings 14 and 15 eachformed of strips 17 section as shown in Fig. I

and 18 in unitary relation with said casting and of outwardly convergingV-shapedcross As shown in Fig. I said strips intersect in diagonalcassated ,relation with diamond-shaped spaces between them; theintersections o the strips in each of said gratin 1,4 and 15 beingopposite the `centers o the diamond-shaped spaces of the'other grating.As shown in Fig. I the strips18 intersectingintrmediate of saidpartition bars9 at the bottom thereof are separate from the adjacentbase bar 7 at said intersection and have auxiliary strips 2() extendingfrom the junctions of said base bar -7 with said partitions 9 inconnection with said intersecting strips 18 be- 'tween the intersectionsof the latter and said partitions; said strips 20 being in unitary castrelation with said stri s 18, base bar.7, partition bars 9 etc.' As a venoted such construction permits the base bar 7 `to be compressed fromthe primary ition, in which they are cast, as indicat ted lines in Fig.VI, to the final position, indicated in full lines in said figure,without depressing the adjacent intersectin strips 18 to restrict thearea of the cham rs 1'2, and leaving said intersections in position tosupport the active material without liability of being thrust outward byressure of said material, the latter tendency in overcome by saidauxiliary strips 20. n this in dotconnection, it maybe observed withreference to Fig. II that the strips 17 and 18 as they approach the basebars 7 are of slightly greater thickness than at points remote from saidbase bar, and consequently the grid is to withstand the increasedpressure of the active material which at the lower part of the finishedelectrode tends to -outwardly displace said strips.

It may be observed, with reference to Fig.

V, that the construction and procedure above described, leaves openings22 between said base bars 7 adjacent the respective side frame membersv'arid 6, because the latter are not recessed like the partition bars9.'

However, grids may be made without such openings 22 by recessing saidframe members '5 and G as indicated at Q3 and 24 in Figs. VII and VIII.'the base bars 26 in this form of myinvention being of the samethickness throughout their length so that they may be pressed intocontact with each other as shown in Figs. IV and X.

I prefer to make the strips of the gratings intersect intermediate ofthe vertical partition bars 9 as shown in Fig. I to afford suiiicientrigidity to prevent buckling of the grids for positive plates. However,the grids for negative plates, ar not required to be as rigid asfor'positive plates, because of the more yielding character of theactive material of the negative plates, and may be made of simpler form,for instance as shown :in Fig'.A X,.whe:ein the gratings at the re:ipectiyely opposite faces oi the plate 30 are respectirely formed bystrips 3 1 and y32 'which extend from the frame members 33 to thevertical partition` bars 34, 'and between be constructed and arrangedlike the base bars 7, as shown in Figs. il to VI inclusive, or like thebase bars 26 shown `1n Figs. VH to X inclusive. That is to said parti-ttion bars Se are recessed in the direction of their length betweensaidbase bars 36 as indicated at l() in Fig. il; buttheirame bars 33 may beleither thus recessed or not. Said grids are adapted to be supported byresting upon two ribs5 extending transl versely to the planes, at thebottom of the battery cells, wherel have made the base bars of greatervertical extent, as indicated at l0 in Fig. 'l ande). in 1Eig. XI.

'l find it preferable to maire said castings oilead alloyed withantimony sufficient to impart the desired degree of rigidity.

j I do not desire to limit myself to the pre1-'3,

cise details of construction and arrangement herein set forth; as it isobvious that various modiiications may be .made ltherein without.departing from the essential features of my invention'as defined in theappended claims;

I claim 1. A storage battery grid consisting of a metal frame includingtwo base members; and two parallel series of inclined strips of whichcertain strips adjacent .the base members are structurally separa-tefrom and independent of said members.

2. A storage battery. grid consisting of la' metal frame including, twobase members; and two series of inclmed mtersectlng strips of whichcertain strips adjacent the base members are structurally separate fromindependent of said members.

3. A storage battery grid consisting of a metal frame including two basemembers; partition members extending from s'aid base members; two seriesof inclined intersecting strips connecting` the partition members ofeach adj acent pai r thereof, certain of the-intersecting strips adjacnt the base members being structurally separate 'from and independentof said members; with auxiliary strips extending` from the junction ofthe base meinand . bers with the partition members, to the ad-v jacentintersecting strips.

Ll. A storagebattery grid consisting of a metal trame including twosubstantially parallel base n'iclnbcrs; partition members; and two.series of strips connecting adjacent partition'members, the lower endsof the partition Y members being forked and the branches of each forlibeing respectively connected to the base members. 'y 5;-A storage`battery grid consisting ci" a ribs of a battery cell; partition membemei:-

tending from said base members; and two series of strips connecting thepartition members.

6. A storage battery vgrid consisting of a metal frame including twosubstantially parallel base4 members;'and two series ci' strips 'whichincrease in thickness es they approach said base. members.

7. Astorage battery grid consisting of a metalv frame including oppositeside members; with two substantially4 parallel base members ofdiminished thickness adjacent their ends and having said ends connectedto said side members. f

8. A Storage battery gridc'onsisting of a metal frame including oppositeside members; two parallel'ba'se members extending between' said sidemembers; forked parti' tion -members extending from said base members;and two series ot strips connecting the partition members or' eachadjacent pair thereof. f

9. A storage battery grid consisting of a metal. frame includingopposite side members; two parallel base members extending between saidside members; partition memj bers extendin r from said base members; and106 two series o strips connecting the partition members; said basemembers being directly connected to each other at their ends only.

10. A storage battery grid consisting of a 105 metal Aframe includingtwo v substantially parallel base bars; and members having -forked endswith their branches respectively signed my name at Philadelphia,Pennsyl- Vania, this nineteenth day of June, 1913.

EDWARD EARLE EVERETT.

lVitnesses:

JAMES M. SK'IN'NER, y

1 S'rooK'roN H. MoR'rIMER.

